I had an MRI last month (2 months after my head Injury w/concussion) and felt very dizzy when it was over. I also started in with migranes that same day. Let me just say that i have never had migranes before, and up to that point, I was having head pressure with a slew of other symptoms...but no severe headaches. The Doctors say there's no connection, but it's very coincidental to me.